Apparatus for the manufacture of water-gas.



A. G. GLASGUW. APPARATUS FOR THE MANUFACTURE 0? w ATER GAS.

- APPLICATION FILED NOV. 11,1911.

Patented 0ct.27,19 14 3 SHEETS-SHEET 1.

INVENTOF? WITNESSES 32+ ur 8% A. c. GLASGOW.

M l'fsl ih'l'lh Tfli 'I'IH'. MANUFIWIUIIIT OF WATER AKILIUA'I'IUN TIMI! NOV. 11, WUv 1 1 5,065. Patented Oct. 27, 1914.

3 SUEETS- SHEET '3 INVENTOR ATTORNEY A. G. GLASGOW. APPARATUS FOR'THE MANUFACTURE OF WATER GAS.

APPLIUATION FILED NOV.11, 1011.

3 SHEETS-"SHEET 3.

Patented Oct. 27, 1914.

INVENTOR ATTORNEY ARTHUR G. GLASGOW, or RICHMOND,

VIRGINIA, ASSiGNOlt TO THE UNITED GAS IIVL PROVEMENT COMPANY, OF PHILADELPHIA, EENNSYLVANIA. A CDRPORATION OF PENNSYLVANIA. I

APPARATUS FOR THE MANUFACTURE OF W'ATER-GAS.

Specification of Letters Patent.

iatinu ind ti t-t. 2'3, Hill 41-.

Application filed November 11, 1911. Serial No. 659,751.

To all l.L/LOIII it may concern Be it known that I, ARTHUR G. GLAsuow, a citizen of the United States of America, residing in Richmond, county of Henrico, and State of Virginia, but temporarily an inhabitant of the city of lVestminster, county of London, England, have invented certain new and usefullmprovements in Apparatus for the Manufacture of Water- Gas, of which the following is a true and exact description, reference being had to the accompanying drawings, which form a part thereof.

My invention relates to the manufacture of water gas by the intermittent process where the run or period of gas-making (when heat is absorbed from the fuel-bed) and the blow or period of air blasting (when heat is restored to the fuel-bed) alternate. In this process there is now usually employed a generator through which the airblast passes always upward, Whereas the direction of the gas-making steam is reversible so that it passes either upward or downward at the option of the operator. But, where economy in fuel is of prime importance and it is desired to minimize the percentage of CO in the generator blast products, the twin-generator system has been adopted. This system alters the distribution of the fuel-bed during gas-making from that provided during air-blasting, by connecting two generators at the bottom so that the air blast always passes upward through them in parallel, whereas the gas making steam passes down through one and up through the other, in alternating series. Therefore, more complete conversion of the oxygen of the steam to CO is insured by the passage of the steam through two heated fuel beds, whereas the divided air blast passes through but one fuel bed; thus minimizing the percentage of (X) in the water gas and the percentage of CO in the blast products. The objection to this twin generator system is that the output of gas is but little more than half of that obtained from a single generator of the same grate are... To overcome this deficiency, l have increased the depth of eacho'f the twin generators to that of my single generators,

and in addition to or in substitution for series stemming, l. have admitted steam in carefully regulated and varying: proportions to the bottoms ol' the twin ,inuieralors; but even when so much bottom steam is substituted for series steam (either in modilicd series running or for parallel uprunuingr) that it seriously disturbs the proper distribution 01 heat, causing the rliulter to adhere to the generator wall and notably reducing: the ellicioncy of [hisystem, the output irom a modern single g 'vncratur still remains nearly one third greater than that obtainable with the twin generator system. 'lhis has hitherto been considered an inherent di.--:-- advantage, inseparable from the twin cnerator system, which must be com mnsated for by superior l'uel cronomy. and special ellorts have been made to minimize this disadvantage in earbui'otcd water gas construe tion by the use of common fixing: chambers, blast valves, etc, and otherwise simplifying and perfecting twin generator plant. Now I have ascertained that ii the gas making: steam could. be passed downward in the two generators simultaneously instead ol. through both generators serially, a great increase in output ol' gas would result, and I have invented a plant comprising two grcnerators connected as by a rommon bottom through which generators the gas making steam in proper proportions passes simultaneously either all downward or all up ward, or serially in either direction supplemented by steam for the second generator i'l' and as desired. at til-: option ol' the operator. Convenientiy, earl) gen rator has top and bottom steam inlets. top and bottom gas outlets and air blast inlets. the bottom gas outlets remaining rlosial when sicam is admitted to the top of one gg'euuralor or to the top oi the other generator or lo the bot tom oi both generators. but openinp, when the top gas outlets are both closed and steam is :Hlllllllllfll simultaneously to the tops of both generators; thus. when the other inlets and outlets are uorrrspmidiugly opened and closed. converting the plant into what is, in client, either lwo generators working together as a pair of .egunorators according to the single generator syn-tum, or a single. setting of twin-generator plant. By this in- \cntion, ll am thoroi'ora enabled to work acdrawings am? fiescriptive 'mailiei' bake iliustr'ated and fi-esombed wmch my HlVBIltlOYl may be eml ch I 11% form in zmdiecu.

7f the drawings,

Mmugh 1 Q1. Mile m warming, seLleb, sup- .4 Vs M101. I

0: ah secnnd, genemtor 11 531 in supplying iv the damand my 'mv'stmcnt in repiant, but Wih my invmr in ml'tpui'. 0i nearly 0mwvailabl-e a; will withfuel, Wear and tan L skinnin up a spare sections uii'. plant While mzuiiz'num twin-gamer ha imnaefiiamly changed 1 3m" svsicm of 'wmking xguh m: hims m and: vfn generator :aystmn, cosfi of genmuting w ru'l'xzsl 1c neci ssity spuciaiE kinzincd men g" 11 (.3 mm

wzkrkmg 011 1311?, more:

0: 1 kaeping plant a resmw m ascasioiml use. This optiuml m cmpamty is, thereimw Worth far equi v2 lent in adl tionai new P (111% o'aiwr hand the cost 0'5 1-, 1S iizu has than new w mrieii 2m; pniniad (mi;

hm (a pirlon the apar r a 3 thereof with some. portions ren'ioye'd'; Fig, at this former J 2 :1- side elevation partly in section, with a. pair of smaller the generator mmoved Fig. 3 is a ciinkex'ing and from; ekwation, pm. $3 in SGCfiOIA, with ome m .1 9f air and. pom-1011s removg l. Fig. 1's 3 demil iew eff the show'ng the vaiva setting mmzhanism 111 its ape Min; position fer s'cemning in parallel in direction,

11 1a armrngaamenh tha mtioms 0f the 2 making generators a and. a? are cenneci'ed toggther Linn-5a 2.4 m *bhmugh I 1 err by $116 cwnduit 0 which has an optionai gas afzu-icrz in gfmmlii mid than for a, time (101:1 011501; passage 0 continued by the valve '0 avatar and up *iahrough e and the tops of the respective: generators are provided. wiah blast and. gas cut-let pastii'ely connected clutch is Whose mmnlwrs 2 ,111 and. k" are splined on the shafts and #2 f rm shaft 1 and in and Z2 on shaft 3 and coupled as by swivels as Shfih'il m m ("0mm link i11 so 'i m'i; L111 ,0 mcmlm's Ever )1 said nxembu 1: and [0 are :u inpied t0 uuupla simultuueously these a1: 5"" mm the yoke at Zr and and v. 1 .11 each other at- ]c (was 4) at that we when w, 4/ and w musfi an wm'k iTx'PQKNfJ in unison, u Ming closed when '2) mi. '0 are both 0pm and 6pm) when 7) and wuc but umsml; but when the (Mitch is not so engaged 021m .sna'sfi is free to mtate "uh'es w or w" with of ir lflust tn the lm'ttmns of the two gener- 120 utnw m Mzmflmg up am-(i in pa allul, and

and. 0 cnntrofied by the valves 4) 35 with each other and are 9 ink to tin: commc mg 1111 7 2 of the 95 Mel along the 109 1:40. to the' mgwemenc 0:! 51m When the n. was 4. and w? uiniiy, the clutch 2: need fixed for ilha' production of 01' pzzssmi min an mi-gusl'fying charm 3.26

mission of gasunaking: steam to the distril'iuting and regulating system, which tcm automatically causes the steam to pass through the generators in proper proportion 5 all upward in parallel, or serially (down through one and up through theother) in either direction supplemented by whatever bottom steam (it' any) may be desired, or all downward in parallel according to the setting of the gas outlet valves.

8', c, s, e", s", r, .5 and e are the steam distributing cocks and p, p, p, p and 72* are the steam distributing conduits.

8', 6", s" and c are all. operativcly connected with the shaft 25' to operate simultaneously with the valve r and in such manner that the valves .9 and s are closed and valves 5* and s are open when the valve '1) is open or vice versa. The connection be tween theivalves e, s, a, c" and the shaft 15', comprises in the form shown an arm 6 secured to the shaft 1, a link 13 connecting; the arm t to the operating arm e of the valve 8', a link 6" coniiu-icting the arm c to the arm 8 secured to the elongated spindle 8 of the valve llhe spindle e" of the valve 5" also has secured to it an arm c which is connected by a lie] a to the operating arms 3" and a?" of the valves .9 and a, rcspec- 0 tively. The valves 8 a, c" and s are similarly crmnected with the sh: it t so that e and s are closed and e and s are open when o is open or vice versa. In the connections between lhe valves 8 a, .9 and s and the h f t: th p t 11:07 lan, thin, 20, 80 881, 8B2

8 s and e correspond to the parts it, t,

it, 8 .9 s, a, 3, 5 and 8 respectively.

The conduit p" is formed with a dual (\OI1I1( tion to the steam supply pipe and the valves 5 and s are on one branch of the connection and the valves .9" and is are on the other bunch of that connection, as will be seen from Fig. 2. i

v '1", r and r with their respective steam meters m, m and m are means For regulah ing the steam when it pas sthrough the gimcrators in parallel; 7 being for the steam entering: the conne tin ccruluil and pawsinnj upward in purnlieh and r and r" being for the siniullaiwous top supplies oi" steam which pass downward in parallel.

hen steaming serially, the quantity of steam needed for the top o'l the first gencn v ator is more than that reuuirei'l for one generator but less than that required for both trienerators in parallel d wu-stcamingg the l'ijt'll'i l inlcrmediatc regulation is provided by tor-ans ol, the regrulaiinp; cock 1"" in the lung) conncctimi 7?, which is neutral in paridle! down-steainiug, iv in series steaming autoiuatirally adds to the top of either gcnorator any dosira-a l. lll'flpljlilflll of the total zp aulgitvyilf shsam that is a\'ailalile lru the tepo'l the oihcr generator in parallel dou n- {35 :wllltillll. Eluppleniental bottom ulean'i in series working issupplied, if and as desired, through the stop and regulating cock r arid the meter mi in the conduit 77. The several steam supplies are thus provided with sepa-i rate independent regulation, so that the setting of any may be varied without altering the others.

As shown in Figs. 1, 2 and 3 of the drawings the change lever f is set to disengage the clutch k and the plant is ready for 76: steaming upward in parallel, or serially in either direction with optional bottom steam, according to whether both the valves '0 'u are opened or only one of them; the valve o is closed during the steaming upward in par- 80' allel or serially in either direction. For steaming upward'in parallel both gas valves n and o" are open, and consequently the steam cocks s and s (and c and s) are open and s, e", a and c are shut; steam admittcd through 3 passes through the regulatin cock, r, the cooks e and a", the conduit 7) controlled by then] and meter m, into the conduit 1;, and upward through the two generators in parallel, and the gas produced leaves through the open passages 0' and 0. Separate bottom steam connection and regulation may he used for each generator if desired instead of the single combination connection just described. For steaming serially in either direction as for example downward through the generator (1 and upward through generator a, the gas valve o is closed'by movement of the lever f whichalso closes the steam. cock 3 (and the cock '8) thereby closing the steam conduit 7) to the bottoms of both generators and opens the steam cocks .v' and 8'' thereby opening the steam inlet to the top of gencratera' through the cock 8, the conduit 7) and meter on (8 being closed when the valve o is open), so tbatithe proper quantityol steam is auto matically admitted through the regulating cocks 7" and 1". Supplemental bottom steam, if and as dcsirei'h is admitted through the stop: and regulating coclr r and passes Lbro'uieji ithe cocks s and is" (.sand a" being closed), the conduit 1)" and the meter m into the Liulllllllt c and up through generator (1 the finished gases lea ring this second generaor by way of the open 'iassagc (F. To reverse the d ircction oi? serial steaming the gas valve 0 is opened, thereby closing the steam cocks c and a and opening 8 and s and the gas val vc o? closed, thereby opening the 'sl'cam cocks and c and closing .v and 3?;

the steam inlet to the top of generator (1'. is thus closed by the cock is and that totbe top ol generator (IP opened through the cock at, and the proper quantity of steam now automatieally passes through the regulating; cocks r" and r, conduit 7) and meter in" into the top of generator (6 The supplemental bottom stean'n if any is admitted as l eloru at v and now passes through the optional cocks s and s (3 and s losing closed) the conduit 79' and the meter on into the conduit 0' and up through generator a, the finished gases nowleaving by Way of the open passage 0. A series run in either direction is terminated by simply opening the shut gas valve 0 or n, and regulated steam is thereby auton'iatica'lly'directed to the bottom of both genrators for steaming upward in parallel as described above. Here again it is obvious that separate supplemental bottom steam connection and regulation may be can ployed for each generator if desired instead of the single connection shown in the drawings.

To change from the alternating series method of twin-generator operation into a pair of generators which steam together in parallel either 11 'ard or downward, the operator has onl y to move the change lever to its other position as shown. dotted in Fig. 3. This movement causes the clutch is to couple the shafts t and f with the yoke g at 74 and FF and with each other at so that the two valves a" and '0 and the gas outlet valve '0 must all work together in unison, o being closed when w and '0 are both open, and open when u and v are both closed. Steaming upward in parallel now. proceeds as already described, hut upon moving either lever f or to its other position as shown dotted in Fig. 3, both gas valves 1: and o are closed and the gas valve o opened. This moven'ient also causes the steam cocks s and a and s and s to open and s and s and s to close thereby auton'iatically directing prop erly regulated quantities of steam simultaneously to both generator tops for stcan'ii'ng downward in parallel; the supply to generator a being regulated and measured by the devices 9" and m, and the supply to generator of hy the devices 7' and m the connection 7) rcuiainii'ig neutral. The linishod gases leave the generator bottoms by way of the conduit (1 and the passage through gas outlet valve 1); or if desired a separate bottom as outlet passage and valvemay beijirovided for each generator. The reversal of the steaming from downward in parallel to upward in parallel independently regulated is automatically effected by simply returning one of the lovers f or f? to its former position thereby causing both gas valves o and c to open and the valve Q1 to close, which movement simultaneously closes the steam cocks s and and 8 and s and opens sf and s and s and 48 thus closing both top steam inlets p and p and opening the steam inlet ;0 to the bottom of both generators, To resume serial steaming, the change lever f is returned to its former position, thereby uncoupling the shafts t" and i from the yoke y and from each other,

intranet The optional gas outlet valve a as shown,

resists the normal Working pressures by the weight at its disk, and the latter is adapted to hit when the pressure on its under side exceeds a predetermined amount and this valve may be relied upon to automatically relieve the excess pressure Within the generators should. the three outlets become closed at the same time.

While in accordance with the provisions of the statutes l have illustrated and described the best form of my invention now known to me it will be apparent to those skilled in the art thatchanges may be made in the form. of the apparatus disclosed without departing from the spirit of my invention, and thatcertain features of the in- Vention may be employed with advantage Without a corresponding use of other features.

Having 1n ow described my invention What I claim as new and desire to secure by Letters Patent, is:

1. ln apparatus for the manufacture of water gas, the combination of two generators each connected at one end to the other, and operating provisions including regulaole means for withdrawing gas from, supplying steam to, each end of each generator whereby, while the flow through the generators may be in parallel in the blasting operation, in the gas making operation, the iiow through the generators may bein series for the economical utilization of fuel in normal operation, or may be in parallel when a greater generation of gas is re tjllli'ed.

in a n' ar-atus for the manufacture of water gas, the combination of two generators each connected at one end to the other, and operating provisions including regulable means for withdrawing, gas from, and supplying steam to, each end of: each generator whereby, While the flow through the generators may be parallel in the blasting opeation, in the gas making operation the llow through each generator may be in either direction and may either be in series through the two gei'ierators for the economical utilization voff fuel in normal operation, or be in parallel when a greater genoration of gas is required.

In apparatus for the manufacture of Water gas, the combination of two gencraters each connected at one end to the other and operating provisions including regulable means for withdrawing "as fi'oin, and supplying steam to, each on of each generator whereby, While the flow through the generators may be in parallel in the l'ilasting, operation, in the gas making operation, the flow through the generators may he in series and may be supplemented by steam supplied to the generator through which the gas flows last for the economical utilization ol' fuel in normal operation, or may he in parallel when a greater generation of is rei'piireiil.

l. i ipparatus for the manufacture of water gas wuuprising in combination two generators car-h connected. at one end to the otherand having an individual valve gas outlet troui, and an .iudiviijlual valved steam supply connection to its opposite end, said gciierators also having a valved gas outlet from. and a valvcdsteam supply connection to their connected ends 5. Apparatus for the manufacture of water gas -coinprising in combination two generators each connected at one end to the other and having an individual gas outlet from and an individual valved steam supply connection to its opposite end, said generators also having a gas outlet'from, and

a valved steam supply connection to their coi'inectei'l ends, valves controlling said gas outlets, provisions, adapted to be brought into and out of operation at will, for COIlmeeting said valves so that the gas. outlet at the connected ends of the generators Will close and open as the other gas outlets open and close.

6. Apparatus for the manufacture of water gas comprising in combination two gc'neralxn's each connected'at one end to the other -and having-an individual valved gas outlet from, and anindividual steam sup-Y ply COIlllQClJlOlLliO its opposite end, said gencrators also having a valved gas outlet from and a steam supply connection to their con-' nccted' ends, valves controlling said steam supply conncctlons and provisions connecting said valves so that the steam supply connection to the connected ,ends of the gencrh tors will close and open as the other steam supply connections open and close.

7. Apparatus for the manufacture of (water as cou'iprising in coniibination two generators each connecled at one end to the other and havim an individual gas outlet from, and an inn. vidual steam supply-connection to its opposite end, and a gas outlet from, and a steam supply connection to the connected ends of the generators, valves controlling said gas outlets and said steam supply connections and provisions adapted to he brought into or out of operation at will for connecting said valves so that the steam supply connection to each generator end will close and open as the gas outlet from that generator end opens and closes.

Apparatus for the manufacture of water gas comprising in combination two generators each connected at one end to the other and having an individual gas outlet from, and an individual steam supply con-- nection to its'oppositc end, and a gas outlet leading away from, and a steam supply connection to the connected ends of the generators, valves controlling said gas outlets and said steam supply connections and provisions adapted to be brought into or out of operation at will for connecting said valves so that the gas outlet at the connected ends of the generators will close and open as the other gas outlets open and close, and the steam supply connection to each generator end will close and open as the'gas outlot from that generator end opens and closes.

9. Apparatus for the manufacture of water gas comprising in combination, two generators each connected at one end to the other and each having an individual valved gas outlet from, and an individual steam supply connection to its opposite end, and individual controlling valves for each of said steam supply connections, a valved gas outlet from and a steam supply connection to the connected ends of the generators, two valves, each controlling the last mentioned steam supply connection, and means so connccting one of the last mentioned valves with one, and the other with the second of said individual controlling valves, that the last mentioned steam supply connection will be opened, when and only when both said individual steam connections are closed.

10. Apparatus for the manufacture of water gas comprising in combination, two generators each connected at one end to the other and each having an individual gas outlet from, and an individual steam supply connection to its opposite end, individual valves controlling said outlets and connections, a valved gas outlet from and a steam supply connection to the connected ends of the generators, two valves, each controlling the last mentioned steam supply connection, inter connections between one of the last mentioned valves and the valves controlling the gas outlet from and steam supply conncction to one of said opposite generator ends and interconnections between the remaining valves specified, all so arranged that the steam supply connect-ion to the connected ends of the generators is opened when and onlywhen the other steam supply connections specified are closed and the steam supply connection to said oppositc end of each generator opens and closes as the corresponding gas outlet closes and opens.

11. Apparatus for the manufacture of water gas comprising in' combination, two generators each connected at one end to the other, and each having an individual gas outlet from, and an individual steam supply connection to its 0 posite end, valves controlling said'gas out ets and steam connections, a gas outlet from and a steam supply connection to the connected ends of the generators, two valves, each controlling the last mentioned steam supply connection, infor connections between one of the last mentioned valves and the valves controlling the gas outlet from and steam supply conned ends of the generator, one for supplying steam to the generators in parallel operation and the other of less capacity for supplying a reduced quantity of steam in series operation.

19. Apparatus for the manufacture of water gas com nising in combination two generators each connected at one end to the other and each having an individual valved gas outlet from and an individual steam supply connection to its 0 posite end, a valved gas outlet fronuand wo steam supply connections, of different capacities, to the connected ends of the generators, each of the latter bein provided with and, controlled by each 0 two valves, an individual controlling valve for each of the firstlmentioned steam supply connections and means interconnecting one of the last mentioned valves with a valvein each of the steam" supply connections to the connected ends of the generator, means similarly inter-connecting the other valves specified, said valves and inter-connecting means being so arranged that the steam supply connection'of larger capacityito the connected ends of the generators will be open when, and only when, the steam supply connections to the opposite ends of the generators are both closed and the steam supply connection of smaller capacity to the connected ends of the generators will be open when, and only when the steam supply connections to-the opposite ends of the generators are one open and the other closed.

20. Apparatus for the manufacture of water gas comprising in combination two generators each connected at one end to the other and each having an individual gas outlet from and an individual steam supply connection to its opposite end, a gas outlet from and a steam supply connection to the connected ends of the generators, controlling devices for said gas outlets and steam supply connections and means operable at will which can be set in one position to insure the proper simultaneous operation in gasmaking. of the various controlline devices for parallel flow in either direction through the generators according to the single generator system of working, or shifted to another position to. insure the proper operation in gasmaking of the steam controlling devices for series flow in either direction through the generators when the appropriate one of the individual gas outlets above mentioned is closed and for parallel flow in one direction through the generators' when both of said individual gas outlets are open, according to the modern twin generator system 12 1.- Apparatus for the'manufacturc of waterigas'comnrising in combination two genof working.

craters, teach connected at one end to the other andeach having an individual gas outlet from and an individual steam supply connection to its opposite end and a gas outlet from and a steam supply connection to the connected ends of the generators, controlling devices for the various gas outlets and steam supply connections and a clutch which can be set in one position to insure the proper simultni'umus operation in gasuuihing oi the said controlling devices or parallel flow in either direction through the generators according to the single generator system of working, or shifted to another pcsiti'on to insure the proper operation in gas making of the steam controlling devices for series flow in either direction through thegenerators when the appropriate one of the individual as outlets above mentioned is closed and for parallel flow in one direction through the generators when both of said individual (gas outlets are open, according to the mo earn twin generator system of working.

22. Apparatus for the manufacture of water gas comprising in combination two generators, each connected at one end to the other and each having an individual gas outlet from and an individual steam supply connection to its opposite end and a gas outlet from and a steam supply connection to the connected ends of the generators, controlling devices for the various gas out lets and steam supply connections, and a clutch adapted when in one position to interconnect the various controlling devices for simultaneous operation in gas making to effect a flow in parallel through the two generators in either direction according to the single generator system of working and shiftable to another position which insures the proper operatioirin gasmaking of the steam controlling devices for series flow in either direction through the generators when the appropriate one of the individual gas outlets above mentioned is closed and for parallel flow in one direction through the generators when both of said individual gas outlets areopen according to the mod ern twin generator system of working.

23. Apparatus for the manufacture of wator gas comprising in combination two generators each connected at one end to the other and having. an individual valved gas outlet from, and an individual valved steam supply connection to'its opposite end, and a valved steam supply connection to and a gas outlet from the connected ends of the generators and a valve controlling the last mentioned gas obtlct and adapted to open, if closed, upon a predetermined rise in pressure within the generators. H a

24. Apparatus for the manufacture of water gas comprising in combination two vertical generators connected together at their bottoms, regulable provisions for supplying air under pressure to the bottoms 'of'the generators in the hia'aiizzg apermion, individual; valved gas oufiew and vaivhd. steamsupply connecfisians w iihafwps of the genemtbrs and valveci gas oufiat, and; steam supply cezmectians t9 the hnlhums of saicl generamrs.

25. Afpamtus far manufacture of Water gas comprising in combinat-icn, tvm generatm-s, each connected at one end to fihe other, and each having" an individual valved gas outletfrom and 2m imiifidual swam supply summation to its oppnsiw 9111151, 31 valved gas outlat from an hvhlvedi tetehm supply 00m" auction ta. hhcf zen'i hush; 0f the genermmm, h @fif mll'wa each of said inhviihml. steam connechion, a conduit conneating the two individual steam connections at the inlet sides of the respecfive cut 023 valves, whereby the supply of steam passing through one eff said'cut 01? valves when it is spam and the other cut ofi valve is closed, will be increa ed over the amount passing through it when hath cut off valves are open by steam passing through said conduit.

ARTHUR 6%.. GLASGOW. Witnesses:

C. P. LmnEN, R J Wmmms. 

